Commit f2856884 authored by Sami Tolvanen's avatar Sami Tolvanen Committed by Masahiro Yamada
Browse files

tools: Add gendwarfksyms 



Add a basic DWARF parser, which uses libdw to traverse the debugging
information in an object file and looks for functions and variables.
In follow-up patches, this will be expanded to produce symbol versions
for CONFIG_MODVERSIONS from DWARF.

Signed-off-by: default avatarSami Tolvanen <samitolvanen@google.com>
Reviewed-by: default avatarPetr Pavlu <petr.pavlu@suse.com>
Signed-off-by: default avatarMasahiro Yamada <masahiroy@kernel.org>
parent a56fece7

MAINTAINERS

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@@ -9550,6 +9550,13 @@ W: https://linuxtv.org 
T:	git git://linuxtv.org/media.git

F:	drivers/media/radio/radio-gemtek*









GENDWARFKSYMS









M:	Sami Tolvanen <samitolvanen@google.com>









L:	linux-modules@vger.kernel.org









L:	linux-kbuild@vger.kernel.org









S:	Maintained









F:	scripts/gendwarfksyms/

















GENERIC ARCHITECTURE TOPOLOGY









M:	Sudeep Holla <sudeep.holla@arm.com>









L:	linux-kernel@vger.kernel.org
































kernel/module/Kconfig



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@@ -169,6 +169,14 @@ config MODVERSIONS







	  make them incompatible with the kernel you are running.  If









	  unsure, say N.



















config GENDWARFKSYMS









	bool "gendwarfksyms (from debugging information)"









	depends on DEBUG_INFO









	# Requires full debugging information, split DWARF not supported.









	depends on !DEBUG_INFO_REDUCED && !DEBUG_INFO_SPLIT









	# Requires ELF object files.









	depends on !LTO



















config ASM_MODVERSIONS









	bool









	default HAVE_ASM_MODVERSIONS && MODVERSIONS
































scripts/Makefile



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@@ -54,6 +54,7 @@ targets += module.lds

















subdir-$(CONFIG_GCC_PLUGINS) += gcc-plugins









subdir-$(CONFIG_MODVERSIONS) += genksyms









subdir-$(CONFIG_GENDWARFKSYMS) += gendwarfksyms









subdir-$(CONFIG_SECURITY_SELINUX) += selinux









subdir-$(CONFIG_SECURITY_IPE) += ipe










































scripts/gendwarfksyms/.gitignore
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# SPDX-License-Identifier: GPL-2.0









/gendwarfksyms
























scripts/gendwarfksyms/Makefile
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# SPDX-License-Identifier: GPL-2.0









hostprogs-always-y += gendwarfksyms



















gendwarfksyms-objs += gendwarfksyms.o









gendwarfksyms-objs += dwarf.o









gendwarfksyms-objs += symbols.o



















HOSTLDLIBS_gendwarfksyms := -ldw -lelf